package com.itemwaimai.reggin.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itemwaimai.reggin.common.CustomException;
import com.itemwaimai.reggin.entity.Category;
import com.itemwaimai.reggin.entity.Dish;
import com.itemwaimai.reggin.entity.Setmeal;
import com.itemwaimai.reggin.mapper.CategoryMapper;
import com.itemwaimai.reggin.service.CategoryService;
import com.itemwaimai.reggin.service.DishService;
import com.itemwaimai.reggin.service.SetmeaService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmeaService setmeaService;
    /**
     * 根据id删除分类，删除之前需要进行判断
     * @param id
     */
    @Override
    public void remove(Long id) {
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper =new LambdaQueryWrapper<>();
        //添加查询条件，根据分类id进行查询
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int dishCount = dishService.count(dishLambdaQueryWrapper);
        //查询分类是否关联了菜品，如果已经关联，抛出一个业务异常
        if (dishCount > 0){
            //已经关联菜品，抛出一个业务异常
            throw new CustomException("分类下关联了菜品，不能删除");

        }


        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper =new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int setemaCount = setmeaService.count(setmealLambdaQueryWrapper);
        //查询分类是否关联了套餐，如果已经关联，抛出一个业务异常
        if (setemaCount > 0){
            //已关联套餐，抛出一个业务异常
            throw new CustomException("分类下关联了套餐，不能删除");
        }
        //正常删除分类(super可以调用父类的属性)
        super.removeById(id);
    }
}
